By combining the principles of the well‐known processes of alkaline chlorination and electrolytic oxidation it has been demonstrated that it is possible to obtain more effective treatment of concentrated cyanide wastes. Rock salt is added to the waste solution and hypochlorite is produced by electrolysis in the solution. Complete destruction of cyanide and destruction of most of the cyanate formed results at the rate of about 0.1 lb cyanide/kwhr. Plating metals can be recovered by cathodic deposition. During the course of the electrolysis, the discharge of cadmium ions at the cathode results in a lowering of the pH until the optimum value for cyanate oxidation is reached. Safety hazards are minimized since there is never more than a slight excess of chlorine present. A graphite anode can be used with no overvoltage problems and with a long life expectancy.
Diabetes Mellitus (DM) is a complex metabolic disorder associated with multiple microvascular complications leading to nephropathy, retinopathy, and neuropathy. Mounting evidence suggests that red blood cell (RBC) alterations are both a cause and consequence of disturbances related to DM-associated complications. Importantly, a significant proportion of DM patients develop varying degrees of anemia of confounding etiology, leading to increased morbidity. In chronic hyperglycemia, RBCs display morphological, enzymatic, and biophysical changes, which in turn prime them for swift phagocytic clearance from circulation. A multitude of endogenous factors, such as oxidative and dicarbonyl stress, uremic toxins, extracellular hypertonicity, sorbitol accumulation, and deranged nitric oxide metabolism, have been implicated in pathological RBC changes in DM. This review collates clinical laboratory findings of changes in hematology indices in DM patients and discusses recent reports on the putative mechanisms underpinning shortened RBC survival and disturbed cell membrane architecture within the diabetic milieu. Specifically, RBC cell death signaling, RBC metabolism, procoagulant RBC phenotype, RBC-triggered endothelial cell dysfunction, and changes in RBC deformability and aggregation in the context of DM are discussed. Understanding the mechanisms of RBC alterations in DM provides valuable insights into the clinical significance of the crosstalk between RBCs and microangiopathy in DM.
Cellulose is a structural linear polysaccharide that
is naturally
produced by plants and bacteria, making it the most abundant biopolymer
on Earth. The hierarchical structure of cellulose from the nano- to
microscale is intimately linked to its biosynthesis and the ability
to process this sustainable resource for materials applications. Despite
this, the morphology of bacterial cellulose microfibrils and their
assembly into higher order structures, as well as the structural origins
of the alternating crystalline and disordered supramolecular structure
of cellulose, have remained elusive. In this work, we employed high-resolution
transmission electron and atomic force microscopies to study the morphology
of bacterial cellulose ribbons at different levels of its structural
hierarchy and provide direct visualization of nanometer-wide microfibrils.
The non-persistent twisting of cellulose ribbons was characterized
in detail, and we found that twists are associated with nanostructural
defects at the bundle and microfibril levels. To investigate the structural
origins of the persistent disordered regions that are present along
cellulose ribbons, we employed a correlative super-resolution light
and electron microscopy workflow and observed that the disordered
regions that can be seen in super-resolution fluorescence microscopy
largely correlated with the ribbon twisting observed in electron microscopy.
Unraveling the hierarchical assembly of bacterial cellulose and the
ultrastructural basis of its disordered regions provides insights
into its biosynthesis and susceptibility to hydrolysis. These findings
are important to understand the cell-directed assembly of cellulose,
develop new cellulose-based nanomaterials, and develop more efficient
biomass conversion strategies.
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